Halloween is an American horror franchise that consists of ten slasher films, novels, and comic books. The franchise focuses on the fictional character of Michael Myers who was committed to a sanitarium as a child for the murder of his older sister, Judith Myers. Fifteen years later, he escapes to stalk and kill the people of Haddonfield, Illinois while being chased by his former psychiatrist Dr. Sam Loomis. Michael's killings occur on the holiday of Halloween, on which all of the films primarily take place. The films collectively grossed over $366 million at the box-office worldwide.